Spray nozzle



Dec. 3, 1929. J. F. CURTIS SPRAY NOZZLE Filed Jan. 27, 1926 Patented Dec. 3, 1929 UNITED STATES PATENT OFFICE JOHN F. CURTIS, OF CHICAGO, ILLINOIS, ASSIGNOB TO O. F. JORDAN COMPANY, OF EAST CHICAGO, INDIANA, A CORPORATION OF INDIANA SPRAY NOZZLE Application filed January 27, 1926. Serial No. 84,039.

This invention relatesto improvements in spray nozzles and it consists of the matters hereinafter described and more particularly pointed out in the appended claims.

The primary object of the invention is to provide a simple and efficient spray nozzle especially adapted for use in rail joint oilers to form a substantially conical spray of a peculiar kind wherein the spray is heavier at diametrically opposite points in one plane than it is at diametrically opposite points in another plane.

A further object of the invention is to provide a spray nozzle wherein the desired intensity of the spray may be readily attained by a simple manipulation of the parts thereof from outside the nozzle casing.

Still another object of the invention is to provide a spray nozzle including a -tapered valve head adapted to coact with a similarly tapered valve seat like discharge aperture formed in the transversely curved wall of the nozzle casing, whereby said aperture is of a peculiar formation in that at diametrically opposite points in one plane it presents in connection with the valve head a greater surface and consequent friction to the sprayl ing fluid, than is presented to the fluid at diametrically opposite points in a planeat a right angle to the first so that a substantially conical shaped spray of a cross section corresponding to a roman capital O is produced. These objects of the invention as well as others, together with the many advantages thereof will more fully appear as I proceed with my specification.

In the drawings Fig. l is a view in elevation of a pair of associated spray nozzles embodying my i nvention in the relative position they occupy with reference to a rail and the joints thereof when embodied in a rail joint oiler.

Fig. 2 is a longitudinal sectional view on an enlarged scale, through one of the nozzles shown in Fig. 1.

Fig. 3 is a transverse vertical section through the same as taken on the line 3-3 of Fig. 2.

Fig. 4 is a view in front elevation of the same.

Fig. 5 is a diagrammatic view illustrating the cross sectional shape of the substantially conical spray produced by my improved nozzle.

Referring now in detail to that embodiment of my invention illustrated in the accompanying drawing, 1-1 indicate tubular nozzle casings, each closed at its bottom end as at 2 and each made integral with conduits 3-3 in which equal pressures are maintained. The conduits 3 form part of a rail joint oiler and when in their normal operative position thereon are disposed in vertical planes equally spaced on each side of the rail 4, the abutting'en'ds .of the rail sections thereof beingk operatively connected together by joint or fish plates 5 and bolts 6 in the manner well known.

Although the nozzle casingsl 14-1 are made integral with the conduits or members 3 ywhich are connected to a suitable source of spraying fluid under pressure, said nozzle casings are inclined outwardly from the plane ofthe associated member 3 and as the structure in each casing is the same a 'detailed description of one will suflice for both.

Each nozzle casing which is tubular in cross section includes a front wall 7 and a rear wall 8 the terms front wall and rear wall being relative only as to their positions with respect to the rail. Made integral with and arranged at a right angle to the rear wall is a tubular extension 9 which defines a chamber l() communicating with the interior of the nozzle casing. In the front wall 7 of the nozzle casing and coaxial with said extension is provided an inwardly tapering valve seat like discharge aperture 11, the defining surface of which is radial with respect to the axis of the nozzle casing on a transverse plane. It is apparent from a comparison of Figs. 2 and 3 that due to the transverse curvature of the front wall 7 of the nozzle casing, the discharge aperture is of a greater radial length at diametrically opposite points in the longitudinal plane of the casing than it is at diametrically opposite points in a plane at a right angle thereto, which of course is the transverse plane of the casing.

Within the nozzle casing and coaxial with the tubular extension and 'discharge aperture is provided a valve member 12 including a stem 13 and a head 14 on one end thereof, which is tapered toward said stem, in accordance with the taper of said aperture. The opposite end of said stem, extends through the end wall of the tubular extension of the nozzle casing and upon the saine is threaded a nut l5, a washer 16 being interposed between said end wall of the extension and said nut. It will be noted from Figs. 2 and that the bearing of said stem in said end wall of the extension is relatively short and it is not a tight fit and it is therefOre capable o f a limited amount of wabbling movement therein so that when the fluid under pressure fills the nozzle casing, it will also fill the extension chamber and the spraying'. iluid therefore will exert its pressure in a direction parallel with the valve stem and will truly center the head thereof with reference to the discharge V aperture. The amount of Vspace or opening between the valve stem head'an'd valve seat, may of course be adjusted to the desired amount by screwing the nut inwardly or outwardly upon the bolt and should it be desired to close the head upon said aperture, as when the rail joint oiler'is only in transit, the Vnut may be screwed down tojbring the head to seat upon said aperture.

By the formation of the aperture in the front wall of the nozzle casing as before described and thus providing a differential in the radial length'at the different points on the casing part defining the same, a peculiar condition arises in that the spraying fluid meets with more Vsurface friction and therefore more resistance at the top and bottom parts of the valve seat (considering the longitudinal axis of nozzle casing) than it does Vat the sides thereof whereby the spray which issues from the nozzle in the form of a cone, is thinner at the top and bottom than at the sides so that it is of a differential cross. section form corresponding` to a roman capital O as shown in Fig. 5.

Due to the inclination of the nozzle casing,lthe spray thus formed is so directed to! ward the rail as to apply more of the spraying fluid upon the bolts and adjacent horizontal portions ofthe joint plates than upon the top or bottom of the same, in this manner applying more of the fluid where it is most needed and preventing the application 'to the wheel tread portion of the rail. Again with such a substantially conical spray, a greater quantity thereof is directed between the web o f the rail and the joint plates at the Vends thereof, inthe passage of the rail joint oiler asa whole over the rails. I

My improved nozzle comprises but a few parts which may be readilyY asembled and which are of such rugged construction as to amply withstand thejhard use igt receives in service.

lVhile in describing my invention, I have referred to certain details of construction as well as form and arrangement of parts thereof, the same is to be taken for the purpose of illustration only so that I do not wish to be limited thereto except as may be pointed out in the appended claims. i

I claim as my invention:

l. A Spray nozzle for Spraying Oil and 'the like upon rail joints embodying therein a depending tubular casing having an inwardly tapering discharge opening in one sidethereof, a valve stem arranged transversely of and within the casing coaxially with said opening and a tapered head at the free end of the valve stem disposed in said opening which opening` and head are so relatively formed as tol produce a substantially cone shaped s` ray having an uninterrupted dierentia sponding to a roman capital O and therefore heavier at diametricallyopposite points in one plane than at diametrically .opposite points in another plane, the tubular casing being so disposed relative to the rail joint to be sprayed that the heavier portions of theV spray are dispo-sed at ther sides and the thinnerportions are disposed at thetop and bottom of the rail joint.

2. A spray nozzle forI sprayingoil and the like upon rail joints embodying therein 'a hollow casing having. an inwardly tapering discharge opening therein, a tapered head member in said discharge opening,'whih opening and head are so"r.elatively"formed as to roduce a substantially cone shaped spray aving` an uninterrupted differential cross section cor-respondingto a roman capital O and therefore 'heavier' at diametricalgly opposite points in one planey than at diametrically opposite points in another plane, the hollow easing being so disposed relative to the rail joint to be sprayed that the heavier portions of the spray are disposed at the sides and the thinner portions are disposed at the top bottom of the rail joint and head being loosely supported so that it is centered in the opening by the oil discharging therefrom under pressure.

3. A spray nozzle for sprayingoil and the like upon rail joints embodying therein a hollow casing having an inwardly tapering discharge opening therein,a valve stern arrangedf in saidfcasing substantially coaxially with said opening anda tapered head' at the free end 'of the valve stemdisposed in said opening which opening and headare so relatively yformed as to produce a substantially cone shaped spray having anfu'ninterrupted diiferential cross section corresponding to a roman capital (D and therefore heavier at diametrically opposite points in oneplane than at diametrically opposite points inlanother plane, the Vhollow casing being so disposed relative to the rail joint to be sprayed cross. section corre;V

that the heavier portions of the spray are disposed at the sides and the thinner portions are disposed at the top and bottom of the rail joint, and said valve stem being loosely held to thereby loosely support said head so that the head is centered in the opening by the oil discharging therefrom under pres- In testimony whereof, I have hereunto set iny hand, this 19th day of January, 1926. JOHN F. CURTIS. 

